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The simplest ynol, the title compound 2, like the singly and doubly positively charged species 3 and 4, respectively, could be generated in the mass spectrometer. Cleavage of CO from 1 furnished the radical cation 3, which on neutralization with Xe affords the neutral ynol 2. The radical cation 3 can be converted into the dication 4 by charge stripping. equation image
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Baar et al. (1986) studied this question.
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